Shared Libraries:

  • Definition: Dynamically linked libraries (.so on Unix, .dll on Windows) loaded at runtime.

  • Size: Smaller executable size; library code is not embedded in the binary.

  • Linking: Linked at runtime via dynamic linker; requires library presence on the system.

  • Updates: Can be updated independently without recompiling the executable.

  • Performance: Slight runtime overhead due to dynamic linking.

  • Distribution: Must be distributed with the executable or installed on the target system.

  • Memory: Shared across multiple processes, reducing memory usage. Example: libc.so on Linux.

Static Libraries:
- Definition: Archives (.a on Unix, .lib on Windows) embedded into the executable at compile time.

  • Size: Larger executable size; library code is included in the binary.

  • Linking: Linked at compile time; no external dependencies at runtime.

  • Updates: Requires recompilation of the executable to incorporate library updates.

  • Performance: Faster at runtime; no dynamic linking overhead.

  • Distribution: Self-contained executable; no need to distribute the library separately.

  • Memory: Each executable has its own copy, increasing memory usage.

  • Example: libc.a on Linux.